Heptachlor

Lutcher Waterworks

Heptachlor is an insecticide used for termite control until 1988. It is linked to cancer, hormone disruption and neurotoxicity.

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Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	ND	4	ND
2015	ND	4	ND
2016	ND	4	ND
2017	ND	4	ND
2018	ND	2	ND
2019	ND	6	ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.008 ppb

The EWG Health Guideline of 0.008 ppb for heptachlor was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL) 0.4 ppb

The legal limit for heptachlor, established in 1991, was based on analytical detection limits at the time that the standard was set. This limit may not fully protect against the risk of cancer due to heptachlor exposure.

ppb = parts per billion

All test results

Date	Lab ID	Result
2014-02-17	AD89144	ND
2014-02-17	AD89144	ND
2014-10-14	AD98503	ND
2014-10-14	AD98503	ND
2015-06-08	35192498005	ND
2015-06-08	35192498005	ND
2015-09-29	35209762003	ND
2015-09-29	35209762003	ND
2016-03-16	35234654002	ND
2016-03-16	35234654002	ND
2016-09-20	35266509002	ND
2016-09-20	35266509002	ND
2017-01-18	35289822004	ND
2017-01-18	35289822004	ND
2017-10-24	35344091004	ND
2017-10-24	35344091004	ND
2018-08-23	35413208001	ND
2018-08-23	35413208001	ND
2019-02-12	35447884001	ND
2019-02-12	35447884001	ND
2019-08-21	35492540001	ND
2019-08-21	35492540001	ND
2019-10-03	35502712001	ND
2019-10-03	35502712001	ND